Sony HCD-J3MD Service Manual page 38

8. "C1 = AD = " will be displayed.
9. Check that the C1 error becomes 50 or less and the AD error 2
or less.
10. Press the MENU/NO "R" button to stop playback, and press
the A (MD) button and remove the disc.
5-7. Initial Setting of Adjustment Value
Note:
This is mode that is used to return the adjustment results recordedin
the non-volatile memory to the initial setting value. However the
results of the temperature compensation offset adjustment cannot
be returned to the initial setting value.
If the setting are returned to the initial setting value, perform all
adjustments again excluding the temperature compensation offset
adjustment.
For details of the initial setting, refer to "5-4. Precautions on
Adjustments" and execute the initial setting before the adjustment
as required.
Setting Procedure :
1. Press the lm/TUNING – button or ML/TUNING +
button to display "ADJ CLEAR".
2. Press the ENTER/YES "R" button. "Complete!" will be
displayed momentarily and initial setting will be executed, after
which "ADJ CLEAR" will be displayed.
5-8.Recording and Displaying the IOP
Information
The IOP data can be recorded in the non-volatile memory. The IOP
value on the label of the optical pickup and the IOP value after the
adjustment will be recorded. Recording these data eliminates the
need to read the label on the optical pick-up.
Recording Procedure :
1. When the power ON, press the ?/1 button while pressing the
s button and z TAPE button together.
2. Press the lm/TUNING – button or ML/TUNING +
button to display "[Service]", and press the ENTER/YES "R"
button. (If nothing is displayed, press the FUNCTION button
and set the function to "MD".
3. Press the lm/TUNING – button or ML/TUNING +
button to display "Iop Write", and press the ENTER/YES "R"
button.
4. The display becomes "Ref=@@@.@" (@ is an arbitrary number)
and the numbers which can be changed will blink.
5. Input the IOP value written on the optical pick-up.
To select the number : Press the lm/TUNING – button
or ML/TUNING + button.
To select the digit : Press the SYNCHRO REC button.
Note: If a message "Cannot SYNC!" or "NO TAPE" appears
momentarily, press the SYNCHRO REC button several times
until "CD-MD SYNC?" appears momentarily.
6. When the ENTER/YES "R" button is pressed, the display
becomes "Measu=@@@.@" (@ is an arbitrary number).
7. As the adjustment results are recorded for the 6 value. Leave it
as it is and press the ENTER/YES "R" button.
8. "Complete!" will be displayed momentarily. The value will be
recorded in the non-volatile memory and the display will become
"Iop Write".
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Display Procedure :
1. Press the lm/TUNING – button or ML/TUNING +
button to display "Iop Read".
2. When the ENTER/YES "R" button is pressed, "@@.@/##.#"
will be displayed and the recorded contents are displayed.
@@.@ indicates the Iop value labeled on the pick-up.
##.# indicates the Iop value after adjustment
3. To end, press the MENU/NO "R" button to display "Iop Read".
5-9. TEMPERATURE COMPENSATION OFFSET
ADJUSTMENT
Save the temperature data at that time in the non-volatile memory
as 25 ˚C reference data.
Note :
1. Usually, do not perform this adjustment.
2. Perform this adjustment in an ambient temperature of 22 ˚C
to 28 ˚C. Perform it immediately after the power is turned on
when the internal temperature of the unit is the same as the
ambient temperature of 22 ˚C to 28 ˚C.
3. When D101 has been replaced, perform this adjustment after
the temperature of this part has become the ambient temperature.
Adjusting Procedure :
1. Press the lm/TUNING – button or ML/TUNING +
button and display "TEMP ADJUST".
2. Press the ENTER/YES "R" button and select the "TEMP
ADJUST" mode.
3. "TEMP = [OK]" and the current temperature data will be
displayed.
4. To save the data, press the ENTER/YES "R" button.
When not saving the data, press the MENU/NO "R" button.
5. When the ENTER/YES "R" button is pressed, "TEMP =
SAVE" will be displayed and turned back to "TEMP ADJUST"
display then. When the MENU/NO "R" button is pressed,
"TEMP ADJUST" will be displayed immediately.
Specified Value :
The "TEMP = " should be within "E0 - EF", "F0 - FF", "00 -
0F", "10 - 1F" and "20 - 2F".
5-10. LASER POWER ADJUSTMENT
Before starting adjustment:
Check the IOP value of the optical pick-up before adjustments.
(Refer to "5-8. Recording and Displaying IOP Information".)
Connection :
Optical pick-up
objective lens
BD (MD) board
CN110 pin 5 (I+3V)
CN110 pin 4 (IOP)
Adjusting Procedure :
1. Set the laser power meter on the objective lens of the optical
pick-up. (When it cannot be set properly, press the lm/
TUNING – button or ML/TUNING + button continuously
to move the optical pick-up.)
Connect the digital voltmeter to CN110 pin 5 (I+3V) and CN110
pin 4 (IOP).
2. Press the lm/TUNING – button or ML/TUNING +
button and display "LDPWR ADJUST".
(Laser power : For adjustment)
Laser power
meter
Digital voltmeter